|
|
Post by peterberg on Jan 15, 2023 2:22:31 GMT -8
Hi cedro,
There are some things I would do differently.
First: the steel lintel between bell and bench could be left out altogether. Start with the surroundings of the bench and bell, up to the seat height. Next the core and after that the closing of the bench. The bench' seat could be extending to under the bell's wall so that wall would be supported by the seat. In case you think that won't be sturdy enough, best to support the seat temporarily while the bell is built. After hardening of the mortar it's a monolith and won't press down as with loosely stacked bricks.
The lintel above the door need to be separated completely from the bricks by superwool, otherwise the steel will expand and crack the bricks apart. I would use a steel strip completely encapsulated by superwool, no steel exposed at the inside.
|
|
cedro
New Member
Posts: 29
|
Post by cedro on Jan 15, 2023 5:57:56 GMT -8
I'm sorry but I don't understand, I'm not building any bench with metal beams
|
|
|
|
Post by peterberg on Jan 15, 2023 7:08:05 GMT -8
Sorry, my bad. I mixed up your project and another guy's drawing, so my post didn't make any sense.
|
|
|
|
Post by fiedia on Jan 16, 2023 1:06:23 GMT -8
reducing the height of the bell will also reduce the ISA, as I don't have room to widen the base Well the ISA rule is a way to make sure that smokes leaving your bell are not too cold. Since your flue is apparently not insulated, it is better if your smokes are a little hotter. You can have a look at this post to get an idea about vertical temperature gradient inside a bell donkey32.proboards.com/thread/3821/results-chaining-batch-box-bells . I just spotted a possible blooper in your drawings. You are planning to have the vertical exhaust channel in the shape of a chimney pipe inside the bell, yes? In that case either the pipe need to be insulated or build the channel out of bricks in one corner. Your last bell shape is smaller than earlier, please don't make it too small. |
|
cedro
New Member
Posts: 29
|
Post by cedro on Jan 19, 2023 10:01:07 GMT -8
|
|
|
|
Post by fiedia on Jan 21, 2023 2:11:36 GMT -8
The link gives me 'error 400 don't try again'. Is it working for someone ? |
|
cedro
New Member
Posts: 29
|
Post by cedro on Jan 21, 2023 3:31:37 GMT -8
|
|
|
|
Post by fiedia on Jan 22, 2023 1:47:07 GMT -8
Looks good..
I do not see any hole for the primary air inlet. Do you plan to slide the bricks?
How do you plan to access inside the bell for clean up?
What will you use as mortar for the firebox bricks? Along thermal cycles, some cracks will occur between the bricks. I refill them with clay. I do not know if it will stop cracking eventually but I plan to put a second skin anyway.
|
|
cedro
New Member
Posts: 29
|
Post by cedro on Jan 22, 2023 7:15:04 GMT -8
I was thinking of leaving some space between the bricks and the combustion chamber I will install a trap door on the side of the bell at the bottom or I will remove the gas outlet pipe, any other ideas? I will use refractory cement, I will try to spread a layer as thin as possible (about 2 mm) |
|
|
|
Post by fiedia on Jan 22, 2023 7:55:25 GMT -8
I will use refractory cement, I will try to spread a layer as thin as possible (about 2 mm) I am curious to know if you get cracks at the brick junctions. Please give some feedback after at least 20 runs.
A door at bell bottom looks fine to me. Pipe outlets may be small to reach every corner. |
|
cedro
New Member
Posts: 29
|
Post by cedro on Feb 3, 2023 15:11:30 GMT -8
Works in progress Here are the pictures: drive.google.com/folderview?id=11KRF18mnu3nzlfhok7ixanO6ZPlgjg-S1 and 2: place where I will build the stove 3: sheet metal above the floor and iron grate 4: Stove base finished with 5cm/2" thick concrete 5: 5 cm/2" cellular concrete walls, space between the inclined stone walls and the gasbeton part filled with leca expanded clay 6: hollow brick floor channel 7 and 8: dry-burning unit, 88 cm high riser (sorry for not leveled construction) 9: Is there enough space between the combustion unit and the bell floor? 10,11,12: gas outlet from the bell, measures 14cm/5.5"×20cm/7.8" and 14cm/5.5"×14cm/5.5" What do you think? |
|
|
|
Post by josephcrawley on Feb 3, 2023 15:23:35 GMT -8
In photos 10-12 it looks like your brick is not clay but cast concrete. If so I would be careful about using them above the riser.
|
|
cedro
New Member
Posts: 29
|
Post by cedro on Feb 3, 2023 15:49:13 GMT -8
In photos 10-12 it looks like your brick is not clay but cast concrete. If so I would be careful about using them above the riser. yes they are concrete, above riser level i use a double layer of brick and firebrick with 13mm/ 0.5" superwool in between |
|
cedro
New Member
Posts: 29
|
Post by cedro on Feb 4, 2023 2:50:06 GMT -8
drive.google.com/folderview?id=11KRF18mnu3nzlfhok7ixanO6ZPlgjg-S 13 e 14: costruisci la mia valvola di bypass a farfalla
15) part of the wall channels, then I ran out of bricks :-(
16 and 17 ) the base of the bell in 6 cm thick blocks
18) first layer of concrete bricks
19 and 20) base of the combustion chamber and riser in bricks, hollow tiles and firebric (the combustion chamber will be outside the bell)
22) two exit for gas, measures 16.5cm x 15cm, about 2.5 times the riser weight, is this correct?
23) section of bell with an isa of 4.8 is this correct?
24) base of combustion unit with firebrick
25 and 26) second layer of firebrick and secondary air
|
|
cedro
New Member
Posts: 29
|
Post by cedro on Mar 2, 2023 2:02:55 GMT -8
28 and 29) ceramic fiber between the combustion unit and the bricks
30,31,32,33) combustion chamber in fire brick and fireconcrete
34) top of the combustion chamber built with refractory tile, for the other side I used a cast iron plate
Sorry but in one day I forgot to bring my camera….
35) I finished the brick wall channels and lined with corrugated iron
36,38) ceramic fiber between the combustion chamber and the rest
37) the base of the riser with internal measurements of 150mm x 150mm, angles 300mm high, in firebrick and fire concrete
41) the space between the bell and the riser of 25mm for the ceramic fiber
43) floor of the bell covered with a layer of 10 mm of concrete, what do you think of the internal finish of the bell?
44,45) combustion unit finish
46,47) double layer of 13 mm ceramic fiber around the riser, tied with iron wire
48) painting with specific vimeo zirconium product
49,50,51) finished the horizontal brick layers
52) test of the successive 3 layers with the fiber in between
Don't hesitate to ask questions!
|
|
